Asked by Peter madison

20m square of wallpaper cost $36.
A)Calculate the cost of 55m square of the same wallpaper.
b)What area of this wallpaper can you buy for $75.60?
Answered by Bosnian
a ) ( 55 / 20 ) * $36 = $99

b) ( 75.6 / 36 ) * 20 = 42m^2
Answered by Reiny
20 m^2 ---> $36
55 m^2 ---> $x

20/55 = 36/x
4/11 = 36/x
cross-multiply, 4x = 396
x = 99

so the 2nd part in the same way ....
let me know what you get
Answered by Henry
A. (36/20) * 55 = $99.

B. (36/20) * A = 75.60,
A = (20/36) * 75.60.
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